Paramount dropped the C&D. Case closed for fan made cubes. QMx is going to offer replicas of the cubes soon. Hopefully from molds made off of the screen used cubes. I'm beginning to think it's a waste of time to replicate props from new films unless of course it's for yourself only.
QMx is making them?
Ah, there it is: QMx to Develop Super 8 Replicas, Maquettes and Collectibles | QMx Online
Details on QMX's Argus cube replica. Only $15!
https://store.qmxonline.com/Super-8-Argus-Cube-Replica_p_158.html
Polystone is a compound made up largely of polyurethane resin mixed with powdered stone additives that give it added weight and the porcelain or "stone-like" feel that resulted in the materials name itself. Polystone is durable and highly effective at maintaining a sharp paint finish. Unlike porcelain which is fired in an oven, Polystone is a cold-cast material in which no heat is used in the manufacturing process, resulting in much greater variations of paint finish.